Buderus Logamax plus GB142-24 Installation And Servicing Instructions page 67

Servicing
Remove the gas control valve (see fig. 86).
Remove the gas orifice from the gas control valve
(see fig. 87, pos. 1).
Install the gas orifice in the new gas control valve.
Mount the new gas control valve on the fan unit.
Assemble the burner cover with the fan unit and the
gas control valve.
Close both retaining clips.
Tighten the union nut of the gas pipe on the gas
control valve. Make sure that you have inserted the
gasket!
Connect both cable plugs to the fan unit.
Connect the cable plug to the gas control valve.
Open the gas shut-off valve (see fig. 88, pos. 2).
Connect the heating system to the power supply,
insert the main fuse or switch on the circuit breaker.
Set the main switch on the BC10 to "1" (On).
NOTICE!
Carry out all start-up activities according to
the Installation and Servicing Instructions
and complete the start-up report.
You must also check all gaskets and seals affected by
the replacement activities during the tightness test
carried out in operating conditions!
Fit the casing.
We reserve the right to make any changes due to technical modifications!
Installation and Servicing Instructions Logamax plus GB142-24/30/45/60 • Version 12/2004
Fig. 86 Dismantling the gas control valve
1
Fig. 87 Dismantling the gas orifice
Fig. 88 Gas shut-off valve closed (1),
gas shut-off valve open (2)
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